chatgpt-poster

Generate high-quality advertising poster images from natural language descriptions using OpenAI's image generation API (gpt-image-2 / gpt-image-1 / DALL-E 3).

Features

• Describe your needs in plain language — the skill engineers the English prompt for you
• Multiple visual styles: minimalist modern, luxury, vibrant promotional, futuristic tech, Chinese traditional, natural organic, and more
• Portrait (1024×1792, ideal for mobile/print posters) and landscape (1792×1024, ideal for banners) formats
• Defaults to gpt-image-2 (OpenAI's latest image model); switchable to gpt-image-1 or DALL-E 3
• Images saved automatically to ~/Downloads/

Usage

Just say it naturally in Claude Code:

Make a Double 11 sale poster
Create a product launch ad for our new coffee
Design a promotional banner for this event
generate poster
/poster-gpt
/ad-poster

What you can specify

• Product / topic: what you're selling or promoting
• Style: minimalist / luxury / vibrant / futuristic / Chinese traditional / Japanese clean, etc.
• Purpose: social media cover, event promo, e-commerce main image, print poster
• Orientation: portrait (default) or landscape
• Special requirements: color preferences, brand colors, whether to include text

The more detail you provide, the better the result. A single sentence is enough to get started — the skill fills in the rest.

Prerequisites

An OpenAI API key with available credits:

export OPENAI_API_KEY=your_key_here

Add it as an environment variable in Claude Code settings to avoid setting it each time.

About Text in Posters

AI-generated images handle non-Latin text (e.g. Chinese characters) unreliably — characters often distort or appear incorrect. The recommended workflow:

1. Generate a text-free visual base with this skill
2. Add typography in Canva, Photoshop, Figma, or similar tools afterward

Supported Models

File Structure

chatgpt-poster/
├── SKILL.md              # skill instructions
├── README.md             # Chinese documentation
├── README.en.md          # this file
└── scripts/
    └── generate_poster.py  # image generation script